Bought a DUE a month ago. Works great EXCEPT the I2C. All my I2C projects work great on a MEGA2560 but will not work on the DUE. I tried removing the 1k pull ups on the DUE board as they are too small and the project boards I have have pull ups on them. I wired into the 3.3 v supply for the projects to make them compatable with the DUE. Nothing seems to work.